Motion-picture gamera



July 22 1924.

ori inal Filed Aug. 10.

Patented July 22, 1924.

UNITED STATES PATENT OFFICE.

HENRY K. SANDELL, OF CHICAGO, ILLINOIS, ASSIGNOR T MILLS NOVELTY COH- PANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

MOTION-PICTURE CAMERA.

Original application filed August 10. 1921, Serial No. 491,156. Divided and this application filed July 14,

1922. Serial No. 574,910.

T 0 all whom it may concern Be it known that I, HENRY K. SANDELL, a citizen of the United States, residin at Chicago, in the county of Cook and rtate of Illinois, have invented a new and useful Ini- .rovement in Motion-Picture Cameras, of which the following is a specification.

The present invention relates to improvements in motion picture apparatus and more particularly to lens cell and shutter constructions in connection therewith. It will be fully understood from the following description. illustrated by the accompanying drawings, in which:

a part of a motion picture device showing on enlarged scale an objective and shutter mechanism in accordance with this invention; and

Fig. 2 is a broken sectional view showing the arrangement 'of the lens cell in the camera.

Referring more particularly to the drawings, the numeral 15 indicates a large fiat box or case, of suflicient size to permit the insertion of a holder containing a disk transparency or film upon which a s iral sequence of pictures ma be photograp ed. Such a disk transparency may suitably have engaging members arranged in a spiral and in predetermined relation to each other, so that each engaging member will bear the same relative position to one of the series of pietures to be taken upon the transparency, as more fully described in my prior Patent No.

1.381.849. dated June 14, 1921. The construction of the casing is not a part ofthe present invention and is fully described in my prior application Serial No. 491,156, which has resulted in Patent No. 1,494,810

issued Ma v 20. 1924, and of which this application is a division.

Upon the face of the box 15 is mounted a casing 20, which may suitably be a' casting 46 or of stamped metal. this casing containing the operating mechanism for the device.

The film disk 43 to be exposed in the camera is contained in a plate holder 44, which is supported in the camera and rotated by 50 suitable operating mechanism (not shown). The front of the plate holder 44. said front being suitably double as shown at 51, is provided with a radial shit 52 through which exposures are made upon'the film. 66 A iral sequence of pictures (images) Fig. 1 is a broken vertical section throughis exposed upon the film disk 43 by means of an objective or lens which travels slowly across the film as the latter is rotated. The film travels continuously and the objective is caused to travel with the film for the erlod of each exposure. This is suitably e ected by the co-operation of the engaging members 4 or projections 43 in the spiral oove of film 43. more fully described in t e abovedesignated application, which co-operates with suitable engaging means operatively connected to the objective or objective support.

The objective 53 is mounted in a cylindrical casing or cell 54; which is carried by a pivoted arm 56, in the following manner. The pivoted arm 56 has secured to it a roller 57 which engages in the spiral groove in the disk or film 43, and its spacing from the film is thereby determined. A. link 58 is pivotallv mounted at one end on the arm 56 and to the other end of the link 58 is pivotally secured the bent arm 59 on which is mounted the cell or casing.54 containing the objective The arm 59 is likewise provided with a pawl-like finger 60 which when properly positioned is engaged by the projections 43* in the spiral groove of the film 43, the objective opening being thus positioned over the film between the grooves. The adjacent end of the arm 59 is bent upwardly and passes between two pins 61, 61 mounted on arm 56. its position and movement being thereby in part determined. The other end of the arm 59 beyond the point at which it is pivoted to the link 58 is forced outwardly by means of the spring 62. one end of it is secured to the arm 59 and the other end to the lug 63 formed on the arm 56;

The arm 56 is pivotally mounted upon a standard 64. To this standard is rigidly secured a short arm 65 and coil spring 66 between the end of this arm and the lug 63 forces the arm 56 with the attached devices inuardly toward the film. The standard 64 is mounted upon a supporting bar 67 which in turn is rigidly secured at its end 68 to a steel curtain 69. the ends of which are secured to rollers 70 at opposite ends of a slot formed in the face of the casing 20. This, slot corresponds in position to the slot 52 in the plate holder. The curtain 69 slides in grooves formed between the face of the casing 20 and a plate 71 secured to the underside thereof, a light proof covering for the slot being formed by the curtain. The roilers 70 upon which the ends of the curtain are mounted are protected by suitable hoods lows the spiral grove, being held in 72. The curtain 69 is provided with an opening opposite the lens 53 and a bellows 73 extends from the opening in the curtain to the enlarged end 74 of the cell 54 in which the lens is mounted. This bellows 73 prevents leakage of light, as will bereadily apparent, and permits movement of the lens cell relative to the aperture in the curtain 69.

As the film or disk rotates, the lens fol roper relation to the area to be exposed y'the roller 57 mounted on the arm 56. The pawl 60 on the lens carrying arm 59 is successivel engaged by the projecting members 43 il irmed in the spiral groove on the disk.

These en aging members cause the arm 59 with thedens to move witlnthe disk for a short space of time, during which exposure takes place. The pawl 60 is disengaged at the end of the forward movement of the lens by an outward. movement of the arm 59 resulting from the'curved end of that arm riding upon one of the pins 61 shown in Fig. 8. The link 58 permits the action just described, and also is so arranged that in this movement the lens is also moved slightlytoward the film and tilted or inclined backward to compensate for the forward movement of the film and lens. When the pawl 60 is 'freed from engagement with the-indentation in the disk, the lens-oell is retracted to its normal position by the spring 62. At the end of the return movement, the pawl 60 engages a fresh indentation, causing'the lens-cell to come to a sudden stop, while the momentum of the shutter. which will be described presently, causes it to open to permit the exposure to be made, whereupon the shutter'is again closed by its spring. It should be borne in mind. however, that the disk continues its rotation while the retraction of the lens-cell takes place and the lens-cell then moves forward again with the disk while the exposure occurs. In due time, however, the shutter-spring recovers and closes the shutter, which will now bedescribed. In the enlarged end 74 of the cell 53 for-the lens there is secured a cover member 77 having a cylindrical curvature, this cover member being provided with a suitable o ening 77 directly above the lens. The enl arged end 74 of the cell is likewise formed with a projecting tongue 78 to which is pivotally secured an arm 79 carrying a weighted shutter 80 provided with -an opening 81'. A spring 79 coiled around the pivot 79 supporting the arm 79 engages the tongue 78 and the shutter 80 to hold the latter in position such that the opening 81 is completely out of alignment with the opening 78. The vibration of the 061154 causes a vibration of ly turned end of a projecting tongue 98, be- The lens. cell may be' ing secured by a knot. drawn outwardly by this cord and secured by engagement of a knot on. the cord with fork 98".

A shutter actuated by momentum, or in-.

crtia. in accordance with the invention, may be used in connection with means for projecting pictures as will readily be under- Although'the present invention has been described in connection with the specific de-' tails of an embodiment thereof, it is not in tended that these details shall be regarded as limitations upon the scope of the invention, except in so far as included in the accompanying claims.

I claim:

1. In a moving picture machine, in combination, a lens cell, a weighted shutter in.- terceptiug the lens and "movably secured thereto. and means for reciprocating the lens cell whereby the inertia of the shutter causes it to move with relation'to the lens. 2. In a moving picture machine, in combi-nation,.a lens cell, a weighted shutter intercepting the lens movably secured thereto, means for normally holding the shutter in position .to cover the lens, and means for reciprocating the lens cell whereby the inertia of the shutter causes it to. move to uncover the lens.

In a moving picture machine, in combination, a lens cell provided at its front with an enlarged cham'ber, a weighted shutter movably mounted in said chamber before the lens cell. and means for reciproeating the lens cell whereby the inertia of the shutter causes it to move with relation to the lens.

4. In a moving picture machine, 'in combination, a lens cell provided at its front with an enlarged chamber, a weighted shutter movably mounted in said chamber before said lens cell, means for normally holding the shutter in position to cover the lens. and means for reciprocating the lens cell whereby the inertia of the shutter causes it to un for reciprocating the lens cell whereby the inertia. of the shutter causes it to uncover the lens on movement of the lens cell in one direction.

6. In a moving picture machine. in eonr bination. a continuously moving film, a re ciprocahlc lens cell movablewith said film for a predetermined distance. a weighted shutter before the lens cell and movably se cured thereto. means for normally holding the shutter in position to cover the lens. and means for reciprocating the lens cell when by the inertia of the shutter causes it to un cover the lens and permit exposure during the period of movement of the lens cell with the film.

7. In a moving picture machine. in combination. a continuously moving film. a reciprocahle lens cell movable with said film for a predetermined distance. the lens cell being provided at its front with an enlarged chamber. a weighted shutter movably mounted in said chamber. means for normally holding the shutter in position to cover the lens. and means for reciprocating the lens cell whereby the inertia of the shutter causes it to uncover the lens and permit exposure during the period of movement of the lens cell with the film.

8. In a moving picture machine. a continuously moving film, a reciprocable lens cell movable with said film for a predetermined distancc. said lens cell being provided at its front with an enlarged chamber. a weighted shutter pivotally mounted on said chamber. a spring tending to hold said shutter normally in lens-covering position. and means for reciprocating the lens cell whereby the inertia of the shutter causes it to uncover the lens and permit'exposure during the period of movement of the lens cell with the film.

9. In a moving picture machine. in com bination. a continuously moving film provided with regularly disposed engaging projections. a movable lens cell having means adapted to. engage said projections to cause movement of the lens cell and a weighted shutter before the lens cell and movahly se cured thereto whereby its inertia causes relative movement of the shutter with respect to the lens on movement of the lens cell.

ill. in a moving picture machine. in com-- hination. a continuously moving lm providcd with engaging projections regularly disposed thereupon. a rcciproeable lens ell having means adapted to engage said projections to cause movement of the lens cell with the film for a determined distance, means for returning the lens cell in the reverse'direction. and a weighted shutter be fore the lens cell and movably secured thereto. whereby the inertia of the shutter causes it to move with relation to the lens.

11. In a moving picture machine, in com hination. a continuously moving film provided with engaging p ojections regularly disposed thereupon. a rcciprocable lens cell having means adapted to engage said projections for a determined distance to cause movement of the lens cell with the film for a determined distance. means for returning the lens cell in the reverse direction, a weighted shutter before the lens cell and movahly secured thereto. and means for nor mally holding the shutter in position to c0ver the lens whereby the inertia of the weighted shutter causes it to uncover the lens and permit exposure during movement of the lens cell with the film.

12. In a moving picture machine. in combination. a continuously moving film provided with engaging projections regularly disposed thereupon. a rcciprocable lens cell having means adapted to engage said projections for a determined distance to cause movement of the lens cell with the filth for a determined distance. means for returning the lens cell in the reverse direction. the lens cell being provided with an enlarged chamber at its front. a Weighted shutter movably secured in said enlarged chamber,

and means for normally holding the shutter in position to cover the lens; whereby on return movement of the lens cell the inertia of the shutter causes it to uncover the lens to permit exposure during the next forward movement.

13. In a moving picture machine. in combination, a continuously moving film provided with engaging projections regularly disposed thereupon. a reciprocable lens cell having means adapted to engage said projections for a determined distance to cause movement of the lens cell with the film for a determined distance. means for returning the lens cell in the reverse direction. thelens cell being provided with an enlarged chamber at its Front. a weighted shutter pivot ally mounted in said chamber. and a spring tending to hold said shutter normally in lens-covering position, the inertia of the shutter serving to uncover the lens and per mit exposure during the next movement of the lens cell with the film.

14-. To a moving picture machine. in comoination. a dish film provided with engaging projections disposed in a spiral. means for continuously rotating the dish. a movable lens cell having means adapted to engage aid projections to cause movement of the lens with the disk film. means for returning the lens cell in a reverse direction, means for moving the lens cell transversely across the disk to follow the spiral thereon. and a weighted shutter-before the lens and movablv secured thereto whereby its inertia causes movement of the shutter to uncover the lens andpermit exposure While the lens cell moves forwt rd with the disk film.

15. In a moving picture machine, in eon! weighted shutter pivotally mounted before 10 bination, a continuously moving film prothe lens and movable therewith, means for vided with engaging projections regularl normally holdin the shutter in position to disposed thereupon, a reeipronable lens ce I cover the lens, t e rearward momentum of 5 having means adapted to engage said prothe shutter causing it to uncover the lens and jections for a. determined distance to cause permit exposure during the period of move- 15 movement of the lens cell with the film for ment of the lens cell with the film.

a determined distance, means for returning the lens cell in the reverse direction. and a v HENRY K. SANDELL. 

